Owner's manual

Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 37
0605-023
Figure 21 Mounting Flange Dimensions (in mm)
General Probe and Cooling Set Mounting
Instructions
Follow these general mounting instructions to make the installation. Note
the additional instructions in the following sections regarding specific
situations (mounting with process shut down, mounting with process
running, removing the transmitter for maintenance).
Appendix A, Example Installation of DMT346 on page 171 provides
photographs of installating DMT346 transmitter through a process wall.
The probe should be installed horizontally whenever possible in order to
ensure the best possible performance of the cooling set. Install the probe
according to the following instructions (see also Figure 22 on page 38):
1. Make a round 89.5 + 0.5 mm hole on the process wall.
2. Weld the tube of the mounting flange tightly on the inner metal
plate of the process wall. If the process wall is more than 125 mm
thick, a lengthening piece (max. 50 mm) can be welded on the
mounting tube (for walls thicker than 175 mm, see Figure 23 on
page 38).
3. The cooling set is mounted in a vertical position. Tighten the
screws properly in order to ensure a thermal contact.
4. Unfasten the locking screws on the cooling bar so that you can
push the probe into the bar.
NOTE
Push the probe deep enough: make sure that the marking hole meets the
end of the bar.
lengthening
piece (pipe)
max. 50 125 8
2
ø105
ø88.9 ø84.9
ø118
welding mounting
pipe
M6×16 DIN912
(AISI 316)